Revision d8e50a39 api/faults.py
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# vim: ts=4 sts=4 et ai sw=4 fileencoding=utf-8 |
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# |
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# Copyright © 2010 Greek Research and Technology Network
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# Copyright (c) 2010 Greek Research and Technology Network
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# |
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from django.http import HttpResponse |
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from django.utils import simplejson as json |
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from piston.utils import HttpStatusCode |
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def camelCase(s): |
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return s[0].lower() + s[1:] |
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class Fault(HttpStatusCode): |
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"""Fault Exception""" |
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pass |
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class _fault_factory(object): |
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""" |
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Openstack API Faults factory |
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""" |
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class Fault(BaseException): |
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def __init__(self, message='', details='', name=''): |
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BaseException.__init__(self, message, details, name) |
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self.message = message |
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self.details = details |
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self.name = name or camelCase(self.__class__.__name__) |
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faults = {
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'serviceUnavailable': {
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'code': 503, |
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'message': 'Service Unavailable', |
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}, |
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'unauthorized': {
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'code': 401, |
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'message': 'Unauthorized', |
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}, |
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'badRequest': {
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'code': 400, |
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'message': 'Bad request', |
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}, |
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'overLimit': {
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'code': 413, |
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'message': 'Overlimit', |
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}, |
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'badMediaType': {
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'code': 415, |
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'message': 'Bad media type', |
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}, |
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'badMethod': {
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'code': 405, |
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'message': 'Bad method', |
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}, |
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'itemNotFound': {
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'code': 404, |
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'message': 'Not Found', |
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}, |
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'buildInProgress': {
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'code': 409, |
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'message': 'Build in progress', |
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}, |
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'serverCapacityUnavailable': {
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'code': 503, |
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'message': 'Server capacity unavailable', |
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}, |
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'backupOrResizeInProgress': {
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'code': 409, |
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'message': 'Backup or resize in progress', |
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}, |
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'resizeNotAllowed': {
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'code': 403, |
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'message': 'Resize not allowed', |
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}, |
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'notImplemented': {
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'code': 501, |
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'message': 'Not Implemented', |
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}, |
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} |
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class BadRequest(Fault): |
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code = 400 |
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def __getattr__(self, attr): |
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try: |
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m = self.faults.get(attr) |
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except TypeError: |
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raise AttributeError(attr) |
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class Unauthorized(Fault): |
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code = 401 |
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# details are not supported for now
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m['details'] = ''
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class ResizeNotAllowed(Fault):
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code = 403
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# piston > 0.2.2 does the serialization for us, but be compatible |
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# 'till the next version gets released. XXX: this doesn't do XML! |
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message = json.dumps({ attr: m }, ensure_ascii=False, indent=4)
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code = m['code'] |
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response = HttpResponse(message, status=code) |
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class ItemNotFound(Fault): |
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code = 404 |
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return Fault(response) |
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fault = _fault_factory() |
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# these are in the 2xx range, hence not faults/exceptions |
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noContent = HttpResponse(status=204) |
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accepted = HttpResponse(status=202) |
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created = HttpResponse(status=201) |
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notModified = HttpResponse(status=304) |
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class ServiceUnavailable(Fault): |
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code = 503 |
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